1 files changed, 209 insertions, 0 deletions
diff --git a/include/linux/gameport.h b/include/linux/gameport.h
new file mode 100644
index 000000000..07e370113
--- /dev/null
+++ b/include/linux/gameport.h
@@ -0,0 +1,209 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ *  Copyright (c) 1999-2002 Vojtech Pavlik
+ */
+#ifndef _GAMEPORT_H
+#define _GAMEPORT_H
+
+#include <linux/types.h>
+#include <linux/list.h>
+#include <linux/mutex.h>
+#include <linux/device.h>
+#include <linux/timer.h>
+#include <linux/slab.h>
+#include <uapi/linux/gameport.h>
+
+struct gameport {
+
+	void *port_data;	/* Private pointer for gameport drivers */
+	char name[32];
+	char phys[32];
+
+	int io;
+	int speed;
+	int fuzz;
+
+	void (*trigger)(struct gameport *);
+	unsigned char (*read)(struct gameport *);
+	int (*cooked_read)(struct gameport *, int *, int *);
+	int (*calibrate)(struct gameport *, int *, int *);
+	int (*open)(struct gameport *, int);
+	void (*close)(struct gameport *);
+
+	struct timer_list poll_timer;
+	unsigned int poll_interval;	/* in msecs */
+	spinlock_t timer_lock;
+	unsigned int poll_cnt;
+	void (*poll_handler)(struct gameport *);
+
+	struct gameport *parent, *child;
+
+	struct gameport_driver *drv;
+	struct mutex drv_mutex;		/* protects serio->drv so attributes can pin driver */
+
+	struct device dev;
+
+	struct list_head node;
+};
+#define to_gameport_port(d)	container_of(d, struct gameport, dev)
+
+struct gameport_driver {
+	const char *description;
+
+	int (*connect)(struct gameport *, struct gameport_driver *drv);
+	int (*reconnect)(struct gameport *);
+	void (*disconnect)(struct gameport *);
+
+	struct device_driver driver;
+
+	bool ignore;
+};
+#define to_gameport_driver(d)	container_of(d, struct gameport_driver, driver)
+
+int gameport_open(struct gameport *gameport, struct gameport_driver *drv, int mode);
+void gameport_close(struct gameport *gameport);
+
+#if IS_REACHABLE(CONFIG_GAMEPORT)
+
+void __gameport_register_port(struct gameport *gameport, struct module *owner);
+/* use a define to avoid include chaining to get THIS_MODULE */
+#define gameport_register_port(gameport) \
+	__gameport_register_port(gameport, THIS_MODULE)
+
+void gameport_unregister_port(struct gameport *gameport);
+
+__printf(2, 3)
+void gameport_set_phys(struct gameport *gameport, const char *fmt, ...);
+
+#else
+
+static inline void gameport_register_port(struct gameport *gameport)
+{
+	return;
+}
+
+static inline void gameport_unregister_port(struct gameport *gameport)
+{
+	return;
+}
+
+static inline __printf(2, 3)
+void gameport_set_phys(struct gameport *gameport, const char *fmt, ...)
+{
+	return;
+}
+
+#endif
+
+static inline struct gameport *gameport_allocate_port(void)
+{
+	struct gameport *gameport = kzalloc(sizeof(struct gameport), GFP_KERNEL);
+
+	return gameport;
+}
+
+static inline void gameport_free_port(struct gameport *gameport)
+{
+	kfree(gameport);
+}
+
+static inline void gameport_set_name(struct gameport *gameport, const char *name)
+{
+	strscpy(gameport->name, name, sizeof(gameport->name));
+}
+
+/*
+ * Use the following functions to manipulate gameport's per-port
+ * driver-specific data.
+ */
+static inline void *gameport_get_drvdata(struct gameport *gameport)
+{
+	return dev_get_drvdata(&gameport->dev);
+}
+
+static inline void gameport_set_drvdata(struct gameport *gameport, void *data)
+{
+	dev_set_drvdata(&gameport->dev, data);
+}
+
+/*
+ * Use the following functions to pin gameport's driver in process context
+ */
+static inline int gameport_pin_driver(struct gameport *gameport)
+{
+	return mutex_lock_interruptible(&gameport->drv_mutex);
+}
+
+static inline void gameport_unpin_driver(struct gameport *gameport)
+{
+	mutex_unlock(&gameport->drv_mutex);
+}
+
+int __must_check __gameport_register_driver(struct gameport_driver *drv,
+				struct module *owner, const char *mod_name);
+
+/* use a define to avoid include chaining to get THIS_MODULE & friends */
+#define gameport_register_driver(drv) \
+	__gameport_register_driver(drv, THIS_MODULE, KBUILD_MODNAME)
+
+void gameport_unregister_driver(struct gameport_driver *drv);
+
+/**
+ * module_gameport_driver() - Helper macro for registering a gameport driver
+ * @__gameport_driver: gameport_driver struct
+ *
+ * Helper macro for gameport drivers which do not do anything special in
+ * module init/exit. This eliminates a lot of boilerplate. Each module may
+ * only use this macro once, and calling it replaces module_init() and
+ * module_exit().
+ */
+#define module_gameport_driver(__gameport_driver) \
+	module_driver(__gameport_driver, gameport_register_driver, \
+		       gameport_unregister_driver)
+
+
+static inline void gameport_trigger(struct gameport *gameport)
+{
+	gameport->trigger(gameport);
+}
+
+static inline unsigned char gameport_read(struct gameport *gameport)
+{
+	return gameport->read(gameport);
+}
+
+static inline int gameport_cooked_read(struct gameport *gameport, int *axes, int *buttons)
+{
+	if (gameport->cooked_read)
+		return gameport->cooked_read(gameport, axes, buttons);
+	else
+		return -1;
+}
+
+static inline int gameport_calibrate(struct gameport *gameport, int *axes, int *max)
+{
+	if (gameport->calibrate)
+		return gameport->calibrate(gameport, axes, max);
+	else
+		return -1;
+}
+
+static inline int gameport_time(struct gameport *gameport, int time)
+{
+	return (time * gameport->speed) / 1000;
+}
+
+static inline void gameport_set_poll_handler(struct gameport *gameport, void (*handler)(struct gameport *))
+{
+	gameport->poll_handler = handler;
+}
+
+static inline void gameport_set_poll_interval(struct gameport *gameport, unsigned int msecs)
+{
+	gameport->poll_interval = msecs;
+}
+
+void gameport_start_polling(struct gameport *gameport);
+void gameport_stop_polling(struct gameport *gameport);
+
+#endif